Negative ion formation in dissociative electron attachment to selected halogen derivatives of propane

Dissociative electron attachment(DEA) to halogenated derivatives of propane: 1-bromo-3-chloropropane, 2-bromo-1-chloropropane, 3-bromo-1,1,1-trichloropropane and 1,3-dibromo-1,1-difluoropropane was studied in the gas phase at ambient temperature using a high resolution crossed electron/molecule beams technique. The negative ions formed via DEA reaction were identified using mass spectrometric technique and the anion yields were measured in the electron energy range from 0 to 10eV. The absolute partial cross sections for DEA to the molecules were estimated using the relative flow technique. (C) 2008 Elsevier B.V. All rights reserved.